Method and device for testing wind speed

Abstract

Disclosed is a method and device for testing wind speed. The method includes, but is not limited to: measuring a static pressure P 0 of an inner cavity of a pressure hole of a mobile device (S 100 ), wherein the pressure hole being in communication with the outside; aligning the pressure hole to a wind direction and acquiring a total pressure P of the wind (S 101 ); and acquiring a current wind speed according to a corresponding relational expression between a wind speed v and a dynamic pressure P−P 0 (S 102 ). The device includes, but is not limited to, a pressure sensor and a wind speed acquiring unit. The technical solution acquires the current wind speed according to a correspondence between wind speeds and dynamic pressures of wind, may effectively improve the precision of the wind speed testing, and does not cause damage to relevant parts of the mobile device.

1 . A method for testing wind speed, wherein the method comprises:
 measuring a static pressure P 0  of an inner cavity of a pressure hole of a mobile device, wherein the pressure hole is in communication with the outside, and is a specifically formed opening or an existing designed opening in the mobile device;   aligning the pressure hole to a wind direction and acquiring a total pressure P of the wind; and   acquiring a current wind speed according to a corresponding relational expression between a wind speed v and a dynamic pressure P−P 0 .   
     
     
         2 . The method for testing wind speed according to  claim 1 , wherein the acquiring a current wind speed according to a corresponding relational expression between a wind speed v and a dynamic pressure P−P 0  comprises:
 acquiring the current wind speed according to the formula 
 
       
         
           
             
               
                 v 
                 = 
                 
                   
                     
                       2 
                        
                       
                         ( 
                         
                           P 
                           - 
                           
                             P 
                             0 
                           
                         
                         ) 
                       
                     
                     ρ 
                   
                 
               
               , 
             
           
         
       
       wherein ρ is air density. 
     
     
         3 . The method for testing wind speed according to  claim 2 , wherein the method further comprises:
 measuring a water vapor pressure e in air and measuring an air temperature T; and   calculating the air density ρ according to the formula   
       
         
           
             
               
                 ρ 
                 = 
                 
                   
                     P 
                     
                       
                         R 
                         B 
                       
                        
                       T 
                     
                   
                    
                   
                     ( 
                     
                       1 
                       - 
                       
                         0.378 
                          
                         
                           e 
                           / 
                           P 
                         
                       
                     
                     ) 
                   
                 
               
               , 
             
           
         
       
       wherein R B =287.05 J·kg −1 ·K −1  is a gas constant of dry air. 
     
     
         4 . The method for testing wind speed according to  claim 1 , wherein the mobile device comprises a mobile phone and a wearable device. 
     
     
         5 . A device for testing wind speed, wherein the device comprises:
 a pressure sensor disposed in an inner cavity of a pressure hole of the device for testing wind speed, wherein the pressure hole is in communication with the outside, and is a specifically formed opening or an existing designed opening in the mobile device;   
       wherein the pressure sensor is configured to acquire a static pressure P 0  of the inner cavity of the pressure hole, and when the pressure hole is aligned with a wind direction, acquire a total pressure P of the wind; and
 a wind speed acquiring unit configured to acquire a current wind speed according to a corresponding relational expression between a wind speed v and a dynamic pressure P−P 0 . 
 
     
     
         6 . The device for testing wind speed according to  claim 5 , wherein the wind speed acquiring unit is specifically configured to calculate the current wind speed according to the formula 
       
         
           
             
               
                 v 
                 = 
                 
                   
                     
                       2 
                        
                       
                         ( 
                         
                           P 
                           - 
                           
                             P 
                             0 
                           
                         
                         ) 
                       
                     
                     ρ 
                   
                 
               
               , 
             
           
         
       
       wherein ρ is air density. 
     
     
         7 . The device for testing wind speed according to  claim 6 , wherein the device for testing wind speed further comprises:
 a humidity sensor configured to measure a water vapor pressure e in air;   a temperature sensor configured to measure an air temperature T; and   an air density acquiring unit configured to calculate the air density ρ according to the formula   
       
         
           
             
               
                 ρ 
                 = 
                 
                   
                     P 
                     
                       
                         R 
                         B 
                       
                        
                       T 
                     
                   
                    
                   
                     ( 
                     
                       1 
                       - 
                       
                         0.378 
                          
                         
                           e 
                           / 
                           P 
                         
                       
                     
                     ) 
                   
                 
               
               , 
             
           
         
       
       wherein R B =287.05 J·kg −1 ·K −1  is a gas constant of dry air. 
     
     
         8 . The device for testing wind speed according to  claim 7 , wherein the temperature sensor and the humidity sensor are both disposed in the inner cavity of the pressure hole of the device for testing wind speed. 
     
     
         9 . The device for testing wind speed according to  claim 7 , wherein the temperature sensor and the pressure sensor are integrated on the same chip; or the temperature sensor, the humidity sensor and the pressure sensor are integrated on the same chip. 
     
     
         10 . The device for testing wind speed according to  claim 5 , wherein the device for testing wind speed is disposed in a mobile device, and the mobile device comprises a mobile phone and a wearable device.